Midterm Presentation Biomedical Engineering Design March 11, 2010
description
Transcript of Midterm Presentation Biomedical Engineering Design March 11, 2010
![Page 1: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/1.jpg)
Andrea Castañeda, Daniel Miranda, Jennifer Wang, Kevin Yeroushalmi, Joseph Youssef
Course Advisors: Gordana Vunjak-Novakovic, Keith Yeager, Aaron Kyle, Sarindr Bhumiratana, Matthew Bouchard
Project Advisor: Professor Clark HungConsultants: Professor Gerard Ateshian, Professor David Vallancourt, Yukkee Cheung
![Page 2: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/2.jpg)
BackgroundCurrent status of design
Tremor detection system Dampening system
Demonstration of functionalityTesting dataNext steps
![Page 3: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/3.jpg)
5.5 million Americans suffer from intention tremors, which affect their ability to perform daily activities
Our design targets the area of the arm which is most affected by these tremors
Our device counteracts these tremors by counteracting unwanted motion in the arm and wrist
![Page 4: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/4.jpg)
Regulatory Pathways Relatively unhindered by regulatory
committees No FDA or Pre-Market Approval (PMA) IRB approval
Sales Strategy Online Retail 30 Day Money Back Guarantee Warranty/Servicing Retail Price: $1000
![Page 5: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/5.jpg)
Transcutaneous Electrical Nerve Stimulator (TENS)-- 60 mA, 4-6 Hz settings simulate intention tremors
5-7 lbs of dampening force counteract induced tremors at frequencies of 4-6 Hz
![Page 6: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/6.jpg)
Tremor Detection
TENS
Accelerometer
Microcontroller
Defined parameters
![Page 7: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/7.jpg)
![Page 8: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/8.jpg)
Motion Dampening
Rotary damper
Acrylic moment arms
Wrist brace Straps
![Page 9: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/9.jpg)
![Page 10: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/10.jpg)
Arm forces
![Page 11: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/11.jpg)
TENS + Elbow Brace
TENS
Control
TENS + Elbow & Wrist Brace
TENS + Wrist Brace
![Page 12: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/12.jpg)
Identified Problems Proposed Solutions
Arm shifts within bulky attachment
Narrower bars/more rigid restraints shaped like arm
Detection not incorporated into dampener
Finalize electronic circuit
Static hinge Fabricate central axel and assemble dynamic hinge
Current TENS setup may not accurately represent a tremor
More leads or more accurate placement of leads
![Page 13: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/13.jpg)
![Page 14: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/14.jpg)
Dampening Clutch Design
Rotary damper
Gear Solenoid
![Page 15: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/15.jpg)
![Page 16: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/16.jpg)
Possible Issues Possible Solutions
Velcro allows for shifting Adjustable straps and anatomically molded pieces
Accelerometer inaccuracy Magnetic encoder
Overdampening Hinge with lower torque rating
Solenoid/clutch mechanism does not lock
Explore other actuation options
![Page 17: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/17.jpg)
Detection system senses tremors
Mechanical system dampens up to ~50%
Integration of detection mechanism will allow for dynamic dampening
Consolidation of parts will yield ergonomic device
![Page 18: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/18.jpg)
Course Advisors Gordana Vunjak- Novakovic,
PhD Aaron Kyle, PhD Keith Yeager, MS Matthew Bouchard Sarindr Ick Bhumiratana
Project Advisor Clark Hung, PhD
Consultants Gerard Ateshian, PhD David Vallancourt,
PhD Yukkee Cheung
![Page 19: Midterm Presentation Biomedical Engineering Design March 11, 2010](https://reader036.fdocuments.in/reader036/viewer/2022062520/5681598d550346895dc6d6a1/html5/thumbnails/19.jpg)